Question 331General Subjects - 1st Asst/Chief70% to pass
If a vessel is to be laid up for an extended period of time with minimal utilities provided where freezing is not a concern; boilers may be laid up wet. What statement concerning wet boiler lay-up is true?
AI Explanation
The correct answer is C) The boiler should be completely filled with dearated and chemically treated water until water issues from the atmospheric vent.
This is the correct answer because during wet lay-up of a boiler, it is important to completely fill the boiler with dearated and chemically treated water in order to prevent corrosion of the internal surfaces. Filling the boiler until water issues from the atmospheric vent ensures that there are no air pockets or spaces left in the boiler where corrosion could occur.
The other options are incorrect because ordinary fresh water (A) is not recommended, as it lacks the necessary chemical treatment to protect against corrosion. Filling only to the top of the sight glass (B and D) does not ensure complete filling and protection of the entire boiler interior.
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